diff --git a/src/test/java/picocli/CommandLineTest.java b/src/test/java/picocli/CommandLineTest.java
index 5875742c7..c5b4a3a13 100644
--- a/src/test/java/picocli/CommandLineTest.java
+++ b/src/test/java/picocli/CommandLineTest.java
@@ -3197,10 +3197,11 @@ class App {
             @Parameters
             private List<String> files;
         }
-        setTraceLevel("OFF");
+        setTraceLevel("INFO");
         File file = findFile("/argfile5-escapedAtValues.txt");
         App app = CommandLine.populateCommand(new App(), "aa", "@" + file.getAbsolutePath(), "bb");
         assertEquals(Arrays.asList("aa", "@val1", "@argfile5-escapedAtValues.txt", "bb"), app.files);
+        assertTrue(this.systemErrRule.getLog().contains("Not expanding @-escaped argument"));
     }
 
     @Test